Communication method and apparatus
This application discloses a communication method and an apparatus, and relates to the communication field, so that a network device and a terminal device determine a mapping relationship between spatial correlation parameters and transport blocks when the transport blocks are repeatedly sent. The communication method includes: receiving first indication information, where the first indication information is used to indicate K spatial correlation parameters for receiving a transport block carried on N resources, K and N are integers greater than 1, and K≤N; determining a mapping relationship between the K spatial correlation parameters and the N resources; and receiving the transport block on the N resources based on the mapping relationship.
1 . A communication method, comprising:
receiving first indication information, wherein the first indication information is used to indicate K spatial correlation parameters for receiving N transport blocks carried on N resources, the N transport blocks are the same transport blocks, K and N are integers greater than 1, and K≤N, wherein the spatial correlation parameters are transmission configuration indicator (TCI) information;
determining a mapping relationship between the K spatial correlation parameters and the N resources; and
receiving the transport block on the N resources based on the mapping relationship,
wherein the determining the mapping relationship between the K spatial correlation parameters and the N resources comprises:
determining the mapping relationship between the K spatial correlation parameters and the N resources based on a multiplexing manner of the N resources, wherein the multiplexing manner comprises at least one of space division multiplexing, time division multiplexing, or frequency division multiplexing;
wherein three multiplexing manners are used for the N resources, and the N resources comprise K groups of resources, and the mapping relationship between the K spatial correlation parameters and the N resources comprises:
the K groups of the N resources are first arranged in a second order corresponding to a second multiplexing manner, and then arranged in a third order corresponding to a third multiplexing manner; and
the K spatial correlation parameters arranged in a first order are sequentially mapped to the K groups of resources arranged in the third order; and
wherein the mapping relationship between the K spatial correlation parameters and the N resources comprises:
the K spatial correlation parameters arranged in the first order are cyclically and sequentially mapped to the N resources.
2 . The method according to claim 1 , wherein the mapping relationship between the K spatial correlation parameters and the N resources comprises:
an i th spatial correlation parameter in the K spatial correlation parameters arranged in a first order is mapped to a (K*j+i) th resource in the N resources, wherein i and j are integers, 1≤i≤K, 1≤K*j+i≤N, 0≤j≤┌N/K┐−1, and ┌ ┐ represents rounding up.
3 . The method according to claim 1 , wherein the three multiplexing manners comprise a first multiplexing manner, the N resources comprise M groups of resources, M is a positive integer, and resources in each group of resources are arranged in an order corresponding to the first multiplexing manner.
4 . The method according to claim 1 , wherein the first indication information is transferred by using at least one of second indication information, third indication information, and fourth indication information, wherein the second indication information is carried by using radio resource control (RRC) signaling, wherein the third indication information is carried by using media access control-control element (MAC-CE) signaling, and wherein the fourth indication information is carried by using downlink control information (DCI) signaling.
5 . A communication method, comprising:
sending first indication information, wherein the first indication information is used to indicate K spatial correlation parameters for receiving N transport blocks carried on N resources, the N transport blocks are the same transport blocks, K and N are integers greater than 1, and K≤N, wherein the spatial correlation parameters are transmission configuration indicator (TCI) information;
determining a mapping relationship between the K spatial correlation parameters and the N resources; and
sending the transport block on the N resources based on the mapping relationship,
wherein the determining the mapping relationship between the K spatial correlation parameters and the N resources comprises:
determining the mapping relationship between the K spatial correlation parameters and the N resources based on a multiplexing manner of the N resources, wherein the multiplexing manner comprises at least one of space division multiplexing, time division multiplexing, or frequency division multiplexing;
wherein three multiplexing manners are used for the N resources, and the N resources comprise K groups of resources, and the mapping relationship between the K spatial correlation parameters and the N resources comprises:
the K groups of the N resources are first arranged in a second order corresponding to a second multiplexing manner, and then arranged in a third order corresponding to a third multiplexing manner; and
the K spatial correlation parameters arranged in a first order are sequentially mapped to the K groups of resources arranged in the third order;
wherein the mapping relationship between the K spatial correlation parameters and the N resources comprises:
the K spatial correlation parameters arranged in the first order are cyclically and sequentially mapped to the N resources.
6 . The method according to claim 5 , wherein the mapping relationship between the K spatial correlation parameters and the N resources comprises:
an i th spatial correlation parameter in the K spatial correlation parameters arranged in a first order is mapped to a (K*j+i) th resource in the N resources, wherein i and j are integers, 1≤i≤K, 1≤K*j+i≤N, 0≤j≤┌N/K┐−1, and ┌ ┐ represents rounding up.
7 . The method according to claim 5 , wherein the three multiplexing manners comprise a first multiplexing manner, the N resources comprise M groups of resources, M is a positive integer, and resources in each group of resources are arranged in an order corresponding to the first multiplexing manner.
8 . The method according to claim 5 , wherein the first indication information is transferred by using at least one of second indication information, third indication information, and fourth indication information, wherein the second indication information is carried by using radio resource control (RRC) signaling, wherein the third indication information is carried by using media access control-control element (MAC-CE) signaling, and wherein the fourth indication information is carried by using downlink control information (DCI) signaling.
9 . A terminal device, comprising a processor and a transceiver, wherein:
the transceiver is configured to receive first indication information, wherein the first indication information is used to indicate K spatial correlation parameters for receiving N transport blocks carried on N resources, the N transport blocks are the same transport blocks, K and N are integers greater than 1, and K≤N, wherein the spatial correlation parameters are transmission configuration indicator (TCI) information;
the processor is configured to determine a mapping relationship between the K spatial correlation parameters and the N resources, wherein determining the mapping relationship between the K spatial correlation parameters and the N resources is based on a multiplexing manner of the N resources, wherein the multiplexing manner comprises at least one of space division multiplexing, time division multiplexing, or frequency division multiplexing; and
the transceiver is further configured to receive the transport block on the N resources based on the mapping relationship;
wherein three multiplexing manners are used for the N resources, and the N resources comprise K groups of resources, and the mapping relationship between the K spatial correlation parameters and the N resources comprises:
the K groups of the N resources are first arranged in a second order corresponding to a second multiplexing manner, and then arranged in a third order corresponding to a third multiplexing manner; and
the K spatial correlation parameters arranged in a first order are sequentially mapped to the K groups of resources arranged in an order corresponding to the multiplexing manner; and
wherein the mapping relationship between the K spatial correlation parameters and the N resources comprises:
the K spatial correlation parameters arranged in the first order are cyclically and sequentially mapped to the N resources.
10 . The terminal device according to claim 9 , wherein the mapping relationship between the K spatial correlation parameters and the N resources comprises:
an i th spatial correlation parameter in the K spatial correlation parameters arranged in a first order is mapped to a (K*j+i) th resource in the N resources, wherein i and j are integers, 1≤i≤K, 1≤K*j+i≤N, 0≤j≤┌N/K┐−1, and ┌ ┐ represents rounding up.
11 . The terminal device according to claim 9 , wherein the first indication information is transferred by using at least one of second indication information, third indication information, and fourth indication information, wherein the second indication information is carried by using radio resource control (RRC) signaling, wherein the third indication information is carried by using media access control-control element (MAC-CE) signaling, and wherein the fourth indication information is carried by using downlink control information (DCI) signaling.